TheMathAsker
  • TheMathAsker
Estimate the area of the circle, use 22/7 for π
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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TheMathAsker
  • TheMathAsker
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Sachintha
  • Sachintha
Use the equation \[2\pi r^2\]
anonymous
  • anonymous
Area of a circle is \[\large A=\pi \times r^{2}\] Right now we have the diameter, which is 28. To get the radius, we have to divide the diameter by 2. So \[\large \frac{28}{2}=r\] Once you get the r tell me and we'll plug it into the area of a circle formula :)

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anonymous
  • anonymous
@Sachintha it looks like you combined the circumference formula and area formula together.
Sachintha
  • Sachintha
Sorry my mistake.. :D
TheMathAsker
  • TheMathAsker
So 28 / 2 = 14
Sachintha
  • Sachintha
@TheMathAsker Give it a try as @LegendarySadist said.
anonymous
  • anonymous
Right. And since we're using 22/7 for pi, it would look like this \[\large A=\frac{22}{7} \times 14^{2}\] The next step is to find 14^2
TheMathAsker
  • TheMathAsker
Its 196?
anonymous
  • anonymous
Yep that would be it, good job :). So now we are gonna multiply 196 by 22/7. Which will look like this \[\large A=\frac{22*196}{7}\] So our next step is to find 196*22
TheMathAsker
  • TheMathAsker
That would be 4,312
anonymous
  • anonymous
Right, good job. Now we have to divide 4312 by 7. Which will look like this \[\large A=\frac{4312}{7}\] This is gonna be our final step :)
TheMathAsker
  • TheMathAsker
616?
anonymous
  • anonymous
Yep, that would be our answer, so \[\large A=616\] or more specifically \[\large A=616cm^{2}\]
TheMathAsker
  • TheMathAsker
Thank you so much !!!!!! c:
anonymous
  • anonymous
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